We visited all the important places, including the Colosseum, the Sistine Chapel and Vatican museums and St Peter's, the Pantheon, Castel Sant Angelo, and much more. A 3 day ticket from Omnia bought online covered the cost of entrance to the most important places, which included an hop-on-and-off bus. There was still some queuing involved but not as much as buying one ticket at a time.
Arco di Constantino The Forum The Pantheon
There is so much to see so it’s important to concentrate on the essential places, and accept the fact there are crowds of people sharing this experience with you. We planned each day with care, taking into account the stops for the hop-on-and-off bus to help us along our way.
The only disappointment was that the Trevi fountain is currently being restored but we did drop in a coin so that one day we hope to go again.